JezK
Edit File: inline.php
<?php /** * "Inline" diff renderer. * * Copyright 2004-2010 The Horde Project (http://www.horde.org/) * * See the enclosed file COPYING for license information (LGPL). If you did * not receive this file, see https://opensource.org/license/lgpl-2-1/. * * @author Ciprian Popovici * @package Text_Diff */ /** Text_Diff_Renderer */ // WP #7391 require_once dirname(dirname(__FILE__)) . '/Renderer.php'; /** * "Inline" diff renderer. * * This class renders diffs in the Wiki-style "inline" format. * * @author Ciprian Popovici * @package Text_Diff */ class Text_Diff_Renderer_inline extends Text_Diff_Renderer { /** * Number of leading context "lines" to preserve. * * @var integer */ var $_leading_context_lines = 10000; /** * Number of trailing context "lines" to preserve. * * @var integer */ var $_trailing_context_lines = 10000; /** * Prefix for inserted text. * * @var string */ var $_ins_prefix = '<ins>'; /** * Suffix for inserted text. * * @var string */ var $_ins_suffix = '</ins>'; /** * Prefix for deleted text. * * @var string */ var $_del_prefix = '<del>'; /** * Suffix for deleted text. * * @var string */ var $_del_suffix = '</del>'; /** * Header for each change block. * * @var string */ var $_block_header = ''; /** * Whether to split down to character-level. * * @var boolean */ var $_split_characters = false; /** * What are we currently splitting on? Used to recurse to show word-level * or character-level changes. * * @var string */ var $_split_level = 'lines'; function _blockHeader($xbeg, $xlen, $ybeg, $ylen) { return $this->_block_header; } function _startBlock($header) { return $header; } function _lines($lines, $prefix = ' ', $encode = true) { if ($encode) { array_walk($lines, array(&$this, '_encode')); } if ($this->_split_level == 'lines') { return implode("\n", $lines) . "\n"; } else { return implode('', $lines); } } function _added($lines) { array_walk($lines, array(&$this, '_encode')); $lines[0] = $this->_ins_prefix . $lines[0]; $lines[count($lines) - 1] .= $this->_ins_suffix; return $this->_lines($lines, ' ', false); } function _deleted($lines, $words = false) { array_walk($lines, array(&$this, '_encode')); $lines[0] = $this->_del_prefix . $lines[0]; $lines[count($lines) - 1] .= $this->_del_suffix; return $this->_lines($lines, ' ', false); } function _changed($orig, $final) { /* If we've already split on characters, just display. */ if ($this->_split_level == 'characters') { return $this->_deleted($orig) . $this->_added($final); } /* If we've already split on words, just display. */ if ($this->_split_level == 'words') { $prefix = ''; while ($orig[0] !== false && $final[0] !== false && substr($orig[0], 0, 1) == ' ' && substr($final[0], 0, 1) == ' ') { $prefix .= substr($orig[0], 0, 1); $orig[0] = substr($orig[0], 1); $final[0] = substr($final[0], 1); } return $prefix . $this->_deleted($orig) . $this->_added($final); } $text1 = implode("\n", $orig); $text2 = implode("\n", $final); /* Non-printing newline marker. */ $nl = "\0"; if ($this->_split_characters) { $diff = new Text_Diff('native', array(preg_split('//', $text1), preg_split('//', $text2))); } else { /* We want to split on word boundaries, but we need to preserve * whitespace as well. Therefore we split on words, but include * all blocks of whitespace in the wordlist. */ $diff = new Text_Diff('native', array($this->_splitOnWords($text1, $nl), $this->_splitOnWords($text2, $nl))); } /* Get the diff in inline format. */ $renderer = new Text_Diff_Renderer_inline (array_merge($this->getParams(), array('split_level' => $this->_split_characters ? 'characters' : 'words'))); /* Run the diff and get the output. */ return str_replace($nl, "\n", $renderer->render($diff)) . "\n"; } function _splitOnWords($string, $newlineEscape = "\n") { // Ignore \0; otherwise the while loop will never finish. $string = str_replace("\0", '', $string); $words = array(); $length = strlen($string); $pos = 0; while ($pos < $length) { // Eat a word with any preceding whitespace. $spaces = strspn(substr($string, $pos), " \n"); $nextpos = strcspn(substr($string, $pos + $spaces), " \n"); $words[] = str_replace("\n", $newlineEscape, substr($string, $pos, $spaces + $nextpos)); $pos += $spaces + $nextpos; } return $words; } function _encode(&$string) { $string = htmlspecialchars($string); } }